1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 12 /**************************************************************************/ 13 /**************************************************************************/ 14 /** */ 15 /** GUIX Component */ 16 /** */ 17 /** Multi Line Text Input */ 18 /** */ 19 /**************************************************************************/ 20 21 #define GX_SOURCE_CODE 22 23 24 /* Include necessary system files. */ 25 26 #include "gx_api.h" 27 #include "gx_system.h" 28 #include "gx_multi_line_text_input.h" 29 #include "gx_multi_line_text_view.h" 30 #include "gx_text_input_cursor.h" 31 32 /**************************************************************************/ 33 /* */ 34 /* FUNCTION RELEASE */ 35 /* */ 36 /* _gx_multi_line_text_input_home PORTABLE C */ 37 /* 6.1 */ 38 /* AUTHOR */ 39 /* */ 40 /* Kenneth Maxwell, Microsoft Corporation */ 41 /* */ 42 /* DESCRIPTION */ 43 /* */ 44 /* This function move the cursor to the position */ 45 /* before the first character. */ 46 /* */ 47 /* INPUT */ 48 /* */ 49 /* text_input Multi line text input */ 50 /* control block */ 51 /* */ 52 /* OUTPUT */ 53 /* */ 54 /* None */ 55 /* */ 56 /* CALLS */ 57 /* */ 58 /* _gx_multi_line_text_input_cursor_pos_calculate */ 59 /* Calculate cursor position */ 60 /* according to click point */ 61 /* _gx_multi_line_text_input_cursor_rectangle_define */ 62 /* Define a rectangle for the */ 63 /* cursor */ 64 /* _gx_system_dirty_partial_add Add one dirty area to */ 65 /* dirty list */ 66 /* */ 67 /* CALLED BY */ 68 /* */ 69 /* _gx_multi_line_text_input_keydown_process */ 70 /* */ 71 /* RELEASE HISTORY */ 72 /* */ 73 /* DATE NAME DESCRIPTION */ 74 /* */ 75 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ 76 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ 77 /* resulting in version 6.1 */ 78 /* */ 79 /**************************************************************************/ _gx_multi_line_text_input_home(GX_MULTI_LINE_TEXT_INPUT * text_input)80UINT _gx_multi_line_text_input_home(GX_MULTI_LINE_TEXT_INPUT *text_input) 81 { 82 GX_TEXT_INPUT_CURSOR *cursor_ptr = &text_input -> gx_multi_line_text_input_cursor_instance; 83 GX_POINT cur_pos; 84 GX_RECTANGLE cur_rect; 85 86 if (text_input -> gx_multi_line_text_input_start_mark != text_input -> gx_multi_line_text_input_end_mark) 87 { 88 _gx_multi_line_text_input_left_arrow(text_input); 89 } 90 91 cur_pos = cursor_ptr -> gx_text_input_cursor_pos; 92 93 _gx_text_input_cursor_dirty_rectangle_get(&text_input -> gx_multi_line_text_input_cursor_instance, &cur_rect); 94 95 cur_pos.gx_point_x = (GX_VALUE)(text_input -> gx_window_client.gx_rectangle_left + 96 text_input -> gx_multi_line_text_view_whitespace); 97 98 /* Calculate new cursor position. */ 99 _gx_multi_line_text_input_cursor_pos_calculate(text_input, cur_pos); 100 101 if (cur_rect.gx_rectangle_left != cursor_ptr -> gx_text_input_cursor_pos.gx_point_x) 102 { 103 /* Mark old cursor rectangle dirty. */ 104 _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &cur_rect); 105 106 /* Mark new cursor rectangle dirty. */ 107 _gx_text_input_cursor_dirty_rectangle_get(&text_input -> gx_multi_line_text_input_cursor_instance, &cur_rect); 108 _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &cur_rect); 109 } 110 111 return GX_SUCCESS; 112 } 113 114
